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Welding (How to weld) is the most reliable connection of one-piece parts. In everyday life, it is widely used in the manufacture of fences using chain-link mesh, greenhouse frames, stoves for baths and garages, or various containers needed in summer cottages. A person possessing welding skills is able to create real masterpieces of openwork fencing, roof sheds and other things necessary in everyday life on his personal plot.
WELDING METHODS
The following welding methods exist:
Gas press, using acetyl oxygen flame. The advantages of this type of welding in high performance. Therefore, it is widely used in the oil and gas industry, in particular in the construction of highways for the transportation of oil and gas, as well as in engineering.
Contact, carried out by an electric current having a relatively low voltage with a sufficiently high amperage. This method includes the following types: butt-welding, seam and spot welding.
SELECTING THE RIGHT EQUIPMENT
If you decide to master the technique of welding, then you need welding equipment. It can be rented or bought. Currently, retail outlets offer welding machines equipped with a device that allows to increase or decrease the amperage. Fans of doing everything with their own hands, can make a welding machine from improvised means. In any case, you will need one of the following electrical energy converters:
HOW TO CHOOSE THE ELECTRODES FOR WELDING
For the most common arc welding, electrodes are required that are designed to conduct current to the weld seam. In most cases, it is a wire consisting of a special melting powder. But for those who encounter welding for the first time, it is better to use electrodes in the form of solid rods coated with a melting compound. They allow even a novice to draw a smooth seam. The optimum diameter of the electrode rod for this category of welders is 3 mm. Electrodes of smaller diameter are used to join thin sheets of metal, and for use
STEADING INSTRUCTIONS FOR PERFORMING WELDING WORKS
The surface to be welded must be carefully protected. It should be free of dirt and rust.
Before starting welding, it is necessary to insert the electrode into the holder of the welding apparatus and create an electric arc. For this, it is necessary to induce a current movement in the welding zone This process can be carried out by striking the electrode shaft against the metal or by touching the surface of the workpiece in the form of tapping.
As soon as an electric arc appears, it is necessary to create a gap between it and the surface being joined. This gap should have a constant value and be in the range from 3 to 5 mm.